Piston-ring.



E. B. DAKE.

PISTON me. I APPLICATION FILED JUNE I5. 1915 Inventor Witnesses Attorneys To all whom it may cos also between the her of the ring UNITED STATES PATENT OFFICE.

EDWARD 1B. BAKE, OF MUSKEGON,

PISTON-RING.

Be it known that .l, .IoWAns B. Dania, a citizen of the United States, residing at uskegon, in the county of Muskegon and State of Michigan, have invented a new and useful PlStOI'FRlILg, of which the following is a specification his invention relates to piston rings, one of its objects being'to provide a two part ring the members of which are so constructed and assembled that, when the members expand, as they Wear, they will cooperate to tighten within the groove in the piston.

A stili further object is to provide a piston ring which, when, compressed u. do a groove, will cause one of the members of the ring to be contracted shoe insuring a tight leak-proof connection betwe the ring and the walls of the groove of the piston and piston and the wall of the cylinder in which it is located,

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the comloi nation and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in. the or :ise sin ll invention herein iii Within the scope a out departisg from the 9 tion. y

In the accompanying drawir fer-red form of the invei'ition has In said drawings Figure 1 is an elevation of a piston ring embodying the present improvei'nents- Fig. 2 is a section on line A-.B Fig. 1.

Fig. 3 is a section through one of the mem bers of the ring.

Fig. 4 is a section through the other more the prewill shown.

Figs. 5 and 6 are elevations of the respective members of the ring.

Referring to the figures by characters of reference 1 designates a split ring havin a flat face 2 while the thickness of the ring gradually increases from the ends of the ring to a point diametrically-opposed thereto. In other words, the ring has a circular outer periphery and a' circular inner periphery, but the two peripheries are eccentrically disposed, they being located closest to gether at the point Where the ring is split Furthermore while the ring has one fiat face, as at 3 so as to the other face is tapered,

Specification of Letters Patent. 1; giplicatlon filed June 215, 191a l sts/nixed Jan. 1, 1918.) Serial rm. mares.

form a part oi the surface of an imaginary sphere; The other member 4 of the piston ring is similar to the ring 1 with the exception that while one face is fiat, the other face is flared as at 5 so as to form part of the surface of an imaginary sphere. Ti is when the two rings 1 and 4 are oppositely disposed, the tapered face 3 of riug'l will lit snugly Within the {iared face a oi. ring .2 and the thin portion of each ring will bear against the thiiil portion of the opposed ring with the resu that the ends of the two rings will be pre call diaineiiricaiiy op posed, as inoicaiied in Fig. ll

it is designed to provide a pistol! ring extreme thickness of which slightly greater than the Width of the piston groove in which the ring to he pieced. Thus it will be seen that by forcing a as as described into the piston groove, the arsed. face 5 of the ring eiwilf" cross tightly a the tapered face 3 of the ring 1 and thus tend to compress ring 1 within. the roove. As the piston ring becomes woi 't will or pend expansion ca and 6i. to broad per f 7 tours described the ring is capable of conornnng to a badly worn or untrue move in the piston and an eiiicient packing is thus insured.

What is claimed is 1. A piston ring consisting of opposed split rings each having eccentrically disposed outer and inner peripheries, each of said rings beii'ig'gradually reduced in width and increased in thickness from the split end thereof to the opposed portion of the ring, said rings having interfitting faces coiiperating to expand one of the rings when said rings are preset El together.

2. A piston including opposed split rings each having its outer and inner pcriph cries eccentrically disposed, each of said rings gradually diminishing in Width but increasing in thickness from the ends to the diametrically opposed portion of the ring, said rings engaging faces, one of which is tapered to constitute a spreading means while the other one of and faces is flared,

which is tapered to constitute a spreading means while the other one of said faces is flared, said rings being op ositely disposed with the thin portion of eac ring in engagement with the thick portion of the opposed ring, one of said rings being adjustable angularly to expand it relative to the other mug and to increase the distance between the non-contacting faces of the rings.

4. A piston ring including oppositely disposed split rings each diminishin in width and increasing in thickness from t e ends of the ring to t e diametrically opposed portion thereof, one of said rings be1ng ad ustable angularly relative to the other ring, said rings having contacting faces co'o'perating to expand one of the rings and to increase the distance between the non-contacting faces of the two rings during such angular' adjustment.

In testimony that I claim the foregoing as my own, I have hereto aflixed my s1gnature in the presence of two witnesses.

EDWARD B. DAKE.

Witnesses VVALTER HYMA, PALMER ARNEBERG.

copies of this patent may be obtained for five cents each, by addressing the Commissioner or Patents,

Washington, D. G." 

